SEPTEMBER 17, 2026
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Case File

CVE-2026-81303

MEDIUM · CVSS 6.3 EPSS 0.27%

Source: NVD + CISA KEV + EPSS · Published 2026-09-15 · Last synced 2026-09-17

CyberRota Analysis

AI-Generated

The vulnerability exists in the hawtio-operator, which improperly allows namespace edit users to leverage its permissions to set arbitrary externally-routable hostnames in the Route specification without proper validation or authorization. This flaw can lead to subdomain takeover and potential OAuth redirect hijacking, posing a risk to the integrity of applications relying on these routes. Organizations using hawtio-operator should prioritize remediation to prevent unauthorized access and potential exploitation of their network resources.

CVE
CVE-2026-81303
Severity
MEDIUM
CVSS
6.3
EPSS
0.27%

Original NVD Description

A flaw was found in hawtio-operator. The operator holds routes/custom-host:create permission cluster-wide and writes the tenant-supplied spec.routeHostName value from the Hawtio custom resource directly into the Route spec without validation or authorization checks. A namespace edit user, who normally cannot set custom Route hostnames, can use the operator as a confused deputy to claim arbitrary externally-routable hostnames, enabling subdomain takeover and, in combination with the auto-grant OAuthClient, OAuth redirect hijack.